Severe weather swept through nearly one-third of the u.S. Yesterday, from colorado to massachusetts. With possible tornadoes moving through pennsylvania and connecticut. I looked out. And I could see the debris from the barn itself. And you could hear all the wood being splintered. Reporter: More than 450 reports of powerful storms. And 86-mile-per-hour wind report in indiana and ohio, damaging homes and businesses. Also reports of three inches of rain an hour, bringing flooding throughout michigan and pennsylvania. My car just got swept off the side of highway 24. Reporter: And in colorado, flash floods and a massive and dangerous highway mudslide. Oh, my god. Reporter: Near colorado springs. Sweeping dozens of cars right off the road. Look at this video shot by a driver in the middle of the chaos. I stopped. And just couldn't go anywhere. I got trapped by a river of black water. Reporter: The muddy runoff, 2 1/2-feet deep. Shutting down the highway for hours. There were 20, maybe 30 cars trapped in that swath of road there.

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Residents can expect record temperatures as high as of 130 degrees in places like Death Valley.

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